$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ruby-opengl.git /var/lib/mock/f45-build-35214-694/root/chroot_tmpdir/scmroot/rubygem-ruby-opengl
Cloning into '/var/lib/mock/f45-build-35214-694/root/chroot_tmpdir/scmroot/rubygem-ruby-opengl'...
$ git fetch origin 62b9f670b2f983ebfdad922ca5167cc5e8530ea2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ruby-opengl
 * [new ref]         62b9f670b2f983ebfdad922ca5167cc5e8530ea2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62b9f67 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild